I'm looking or clarification on the maximum duct size issue. My understanding is that my plenum needs to be drawn to include the maximum duct size in the "area', which interpret to mean that particular floor and side of the building? in other words, the maximum duct size for all parts of that floor where ceiling heights align and ducts are continuous.

Question: For the 4.0 CDS Vignette, is the largest duct/joist combination tied to the room or the floor. In other words, is the assumption there are no ceiling height changes by room or across the entire floor of the building?

Tortilla wrote:Question: For the 4.0 CDS Vignette, is the largest duct/joist combination tied to the room or the floor. In other words, is the assumption there are no ceiling height changes by room or across the entire floor of the building?

The ceiling height is uniform across the entire floor unless otherwise noted.